Table 2.

Effect of experimental diets on serum β-glucuronidase activity, stratified by sex and day on experimental diet

	Experimental Diets
	Basal diet* (μg/ml/hr)	F&V diet* (μg/ml/hr)	Ratio of F&V and Basal diets † (95% CI)
All participants, averaged both days	5.43±0.15	5.91 ± 0.17	1.09 (1.05−1.13)‡
Women §	5.19 ± 0.21	5.75 ± 0.23	1.11 (1.05−1.17)‡
Men §	5.69 ± 0.23	6.06 ± 0.25	1.07 (1.01−1.13)‡
Day 8	5.44 ± 0.17	6.15 ± 0.19	1.13 (1.07−1.20)‡
Day 15	5.42 ± 0.17	5.67 ± 0.18	1.05 (0.99−1.11)

Abbreviations: F&V, fruit and vegetable diet; CI, confidence interval

^*Back-log-transformed least-square means ±SE of serum β-glucuronidase activity. Means are adjusted for: sex, days on experimental diet, UGT1A1 genotype, order of assigned experimental diet, carryover effect, β-glucuronidase activity during the pre-intervention period, 2-way interactions between sex, days on experimental diet, UGT1A1 genotype, and experimental diet

^†Ratio was calculated by exponentiating the difference of the log-transformed adjusted, least-square means

^‡Serum β-glucuronidase activity was significantly higher during F&V than during basal diet, P<0.05

^§β-glucuronidase activity averaged over days 8 and 15 of experimental diet